Sealing ring for can-testing machines



Nov. 9v, 1926. 1,606,486

. G. M. Smm-:Ns

SEALING RING FOR CAN TESTING MACHINES Filed August 28,1924

Patented Nov. 9, 1926.

GEORGE M. STEVENS, OF SAN FRANCISCO, CALIFORNIA.

`SIEAIl'iINGr RING- FOR CAN-TESTING MACHINES.

Application filed August 28, 1924. Serial No. 734,820.

This invention relates to can testing machines and in particular to thesealing ring upon which the can is seated during the testing of the samewith air under pressure while the can is submerged in water, or by theother method of testing wherein the air is exhausted from the can whilethe can is seated with its open end upon the sealing ring, all in themanner well known.

The objects of my invention are to provide a special .sealing ring whichwill go 1n place on the standard can testing' machines and which willgive a more effective seal than the rings heretofore used.

In the drawings hereto Figure l is a plan View of my ring.

Figure 2 is a central cross section of the ring as seen from the line2-2 of Figure l, but the ring is shown mounted in one ofthe flanges ofthe can testing machine and which flange is also shown in cross section.

Figures 3, i and 5 are similar sections to that .shown in Figure 2, butshow several modifications of the ring.

In further detail my preferred construction illustrated in Figures l and2, shows the ring to comprise an upper vdisk 1 of soft resilient rubber,a lower disk 2, outer wall 3 and inner wall 4, all vulcanized togetherso as to form an air tight hollow resilient ring with a clear centralopening 5.

This ring in use is seated in one of the metal flanges 6 of the cantesting machine and which flange has inner and outer walls embracing andgiving lateral support to the ring, and also has a central hole 7 foradmission of' the testing air to the can when inverted over the hollowrubber ring, and counter bored at 8 for securing to the machine.

In studying Figure 2, it will be observed that the inner wall 4 is.slightly higher than the outer wall 3 and whereby the upper disk takesan inclination upward away from the edges. This considerably facilitatespositioning of the cans during the operation of the machine.

The precise proportions of the rubber walls depends to a certain extenton the particular grade of rubber and service but the thickness shown inFigure 2 has been found most satisfactory in actual use, and in thisconstruction the lower disk 2 is about a sixteenth of an inch thick, orhalf that of the side walls and upper disk.

In Figure 3 a modification is shown embracing all the .same elements andsimilarly numbered as shown in Figure 2 with the exception of the lowerdisk 2, and in Figure l the construction varies from that of Figure 3 byforming return flanges 9 on the inner.

and outer walls.

The two modifications illustrated in Figures 3 and 4 will functionsimilar to the enclosed construction of Figure 2 except that if the ringis not a tight fit within the metal flange, there is a possibility ofthe air escaping around the edge when the can is forced upon the upperdisk, whereas with the preferred construction the air cannot escape andoffers an increasing pressure around the can rim as the latter ispressed upon it.

In Figure 5 a rubber ring of the form shown in Figure 4L is used but ametal disk lO is vulcanized to the rubber return flanges 9 to form asealed enclosure.

In contemplating my invention above described, it is manifest thatnumerous combinations of metal or other material and rubber can be madewithout ldeparting from the spirit of my invention, for it is apparentthat the upper disk is the only one which must of necessity be of softresilient rubber, tho to make the ring commercially practicable theentire article is made of the same material.

I claim:

l. In a can testing machine, a ring having an annular recess extendingdownwardly from the top thereof and an air cushioned ring in said recessadapted to contact with the end of a can, said air cushioned ring beingmade from a material having the general characteristics of rubber.

2. In a can testing machine, a ring having an annular recess extendingdownwardly from the top thereof and an air cushioned ring in said recessadapted to contact with the end of a can, said air cushioned ring beingmade from a material having the general characteristics of rubber, saidair cushioned ring sloping upwardly from its periphery. f

3. In a can testing machine, a ring having an annular recess extendingdownwardly from the top thereof and an air cushioned,

ring in said recess adapted to contact with the end of a can, said aircushioned ring belng made from a material havlng the generalcharacteristics of rubber, said air cush-A ioned ring being open at thebottom.

4. In a can testing machine, a ring having an annular recess extendingdownwardly from the top thereof and an air cushioned ring in said recessadapted to Contact with the end of ak can, said air cushioned ring beingmade from a material having the general characteristics of rubber, saidair cushioned ring having,- an annular aperture' therearound in itsbottoin.

GEORGE M. STEVENS.

